Milwaukee® 42-04-9111 Adapter, 3/8 in Drive, 3/8 in Female x 1/2 in Male

The 3/8 in drive 3/8 in F x 1/2 in Male adapter with Four Flat™ sides is designed from the ground up to be part of the most versatile socket family. Milwaukee™ adapters feature an innovative design with four parallel flat sides, which deter rolling and are wrench-compatible. The drive sizes are laser etched onto the adapter providing improved, easy-to-read visibility. Chrome plating offers corrosion and rust protection. All Milwaukee mechanics hand tools are backed by a lifetime guarantee.